diff --git a/src/locales/en/achv.ts b/src/locales/en/achv.ts
index 571935aaddf..017d83b3d96 100644
--- a/src/locales/en/achv.ts
+++ b/src/locales/en/achv.ts
@@ -172,39 +172,39 @@ export const PGMachv: AchievementTranslationEntries = {
 
   "MONO_GEN_ONE": {
     name: "The Original Rival",
-    description: "Complete the generation one only challenge.",
+    description: "Complete the Generation I only challenge.",
   },
   "MONO_GEN_TWO": {
     name: "Generation 1.5",
-    description: "Complete the generation two only challenge.",
+    description: "Complete the Generation II only challenge.",
   },
   "MONO_GEN_THREE": {
     name: "Too much water?",
-    description: "Complete the generation three only challenge.",
+    description: "Complete the Generation III only challenge.",
   },
   "MONO_GEN_FOUR": {
     name: "Is she really the hardest?",
-    description: "Complete the generation four only challenge.",
+    description: "Complete the Generation IV only challenge.",
   },
   "MONO_GEN_FIVE": {
     name: "All Original",
-    description: "Complete the generation five only challenge.",
+    description: "Complete the Generation V only challenge.",
   },
   "MONO_GEN_SIX": {
     name: "Almost Royalty",
-    description: "Complete the generation six only challenge.",
+    description: "Complete the Generation VI only challenge.",
   },
   "MONO_GEN_SEVEN": {
     name: "Only Technically",
-    description: "Complete the generation seven only challenge.",
+    description: "Complete the Generation VII only challenge.",
   },
   "MONO_GEN_EIGHT": {
     name: "A Champion Time!",
-    description: "Complete the generation eight only challenge.",
+    description: "Complete the Generation VIII only challenge.",
   },
   "MONO_GEN_NINE": {
     name: "She was going easy on you",
-    description: "Complete the generation nine only challenge.",
+    description: "Complete the Generation IX challenge.",
   },
 
   "MonoType": {
diff --git a/src/locales/en/challenges.ts b/src/locales/en/challenges.ts
index 7401104e1a3..b7dbe2f89a4 100644
--- a/src/locales/en/challenges.ts
+++ b/src/locales/en/challenges.ts
@@ -8,23 +8,23 @@ export const challenges: SimpleTranslationEntries = {
   "singleGeneration.value.0": "Off",
   "singleGeneration.desc.0": "You can only use pokemon from the chosen generation.",
   "singleGeneration.value.1": "Gen 1",
-  "singleGeneration.desc.1": "You can only use pokemon from generation one.",
+  "singleGeneration.desc.1": "You can only use pokemon from Generation I",
   "singleGeneration.value.2": "Gen 2",
-  "singleGeneration.desc.2": "You can only use pokemon from generation two.",
+  "singleGeneration.desc.2": "You can only use pokemon from Generation II.",
   "singleGeneration.value.3": "Gen 3",
-  "singleGeneration.desc.3": "You can only use pokemon from generation three.",
+  "singleGeneration.desc.3": "You can only use pokemon from Generation III.",
   "singleGeneration.value.4": "Gen 4",
-  "singleGeneration.desc.4": "You can only use pokemon from generation four.",
+  "singleGeneration.desc.4": "You can only use pokemon from Generation IV.",
   "singleGeneration.value.5": "Gen 5",
-  "singleGeneration.desc.5": "You can only use pokemon from generation five.",
+  "singleGeneration.desc.5": "You can only use pokemon from Generation V.",
   "singleGeneration.value.6": "Gen 6",
-  "singleGeneration.desc.6": "You can only use pokemon from generation six.",
+  "singleGeneration.desc.6": "You can only use pokemon from Generation VI.",
   "singleGeneration.value.7": "Gen 7",
-  "singleGeneration.desc.7": "You can only use pokemon from generation seven.",
+  "singleGeneration.desc.7": "You can only use pokemon from Generation VII.",
   "singleGeneration.value.8": "Gen 8",
-  "singleGeneration.desc.8": "You can only use pokemon from generation eight.",
+  "singleGeneration.desc.8": "You can only use pokemon from Generation VIII.",
   "singleGeneration.value.9": "Gen 9",
-  "singleGeneration.desc.9": "You can only use pokemon from generation nine.",
+  "singleGeneration.desc.9": "You can only use pokemon from Generation IX.",
   "singleType.name": "Mono Type",
   "singleType.value.0": "Off",
   "singleType.desc.0": "You can only use pokemon of the chosen type.",